Reamer-bit



K (Hommel.)

` L. MYERS.

BEAMER BIT.

f No.550,190. Pate'nteaNov. 19, 1895.f

. Lwhr My ers,

,PHUYO-LITHQWASHINHDKDL UNITED STATES PATENT OFFICE.

LUTHER MYERS, OFWILLIAMSPORT, PENNSYLVANIA.

REAMER-BIT.

SPECIFICATION forming part of Letters Patent No. 550,190, dated November19, 1895.

Appiimion nea october 5, 1894..

To all whom it may concern:

' Be it known that I, LUTHER MYERS, a citid vzen of the United States,residing at W'illiamsport,-in the county of Lycoming and State ofPennsylvania, have invented a new and use ful Beamer-Bit, of which thefollowing is a Specification.

This invention relates to reamer-bits; and it has for its object toprovide a new and useful bit of this character designed for reaming orboring out Wooden pipes or conduits of comparatively large internaldiameter-such, for instance, as underground Wooden casings, WoodenWaterpipes, pump stocks, and the like.

To this end, therefore, the invention contemplates a construction ofreamer-bit providing simple and efficient means for quickly and smoothlyboring out a perfectly straight and smooth hole in the object beingoperated upon. l

With these and other objects in view, which Will readily appear as thenature of the invention is better understood, the same consists ofthenovel construction, combination,

and arrangement of parts hereinafter more fully described, illustrated,and claimed.

In the drawings, Figure 1 is a perspective view of a reamer-bitconstructed in accordance With this invention. Fig. 2 is a centrallongitudinal sectional vieW thereof. Fig. 3 is a detail cross-sectionalvieW on the line x of Fig. 2. Fig. 4 is a similar view on the line y yof Fig. 2. Fig. 5 is an end view of the bit.

Referring to the accompanying drawings, 1 designates the maincylindrical body of the reamer-bit, that is providedat its large endWith an interiorly-threaded portion 2, Which provides means for securingthe body to the ordinary mandrel or stock, such as ordinarily employedfor operating reamers. The said cylindrical body 1 is provided indiametrically-opposite sides With longitudinally dis posed slots 3,Which extend at one end near to the end ofthe body opposite theinteriorlythreaded portion thereof, and said longitudinally-disposedslots are beveled at one side edge, as at 4, to form thelongitudinally-disposed cutting-edges 5 at the periphery of the body.

The main cylindrical body 1 of the reamer is reduced or tapered towardthe end oppo- Seria1No.525,034. (No model.)

formed a series of separate cutting-edges in different circular planes,in order to provide means for regularly increasing the size of the holebeing bored or reamed out, and consequently lessening the strain uponthe Wood being bored and tending to make a perfectly straight and smoothhole. At its small end the main body 1 of the reamer is further providedWith the reduced eXteriorly-threaded attaching-neck 7, the threads ofWhich neck are left-handed and are adapted to receive theinteriorly-threaded large end 8 of the holloW conical leader or nose 9.The leader or nose 9 tapers to a sharp point 10 at the eX- treme end andis hollowed out up to such point, in order that the Worm or conveyorordinarily used in connection With reamers can be inserted into thereamer up to the very point thereof, in order that the cuttings orborings maybe entirely freed therefrom. The hollow conical leader ornose 9 is also provided in the tapered portion thereof With thediametricallyopposite longitudinally disposed slots 11, that are beveledat one side edge, as at 12, to form the longitudinally-disposedcutting-edges 13, and the said slots 11, When the leader or nose 9 isattached to the body of the reamer, alternate With or are disposed outof alignment With the slots in the body 1, so that the strain upon theWood being bored or roamed is eqnally distributed in all directionsduring the operating of the reamer, as Will be readily understood bythose skilled in the art.

Beyond the inner ends of the slots 11 in the leader or nose 9 the saidleader or nose is untapered, to form With the corresponding part of thesmall end` of the body 1 a smooth circular blank portion 1li, that isneither slotted nor provided With cutting-edges, and the length of saidblank portion between the innermost point of the cutting-edges 13 andIOO the outermost point of the cutting-edge of the slots 3 is designedto be about one inch, and the diameter of the blank portion 14: isslightly less than the diameter of the leader or nose 9 at the innermostpoint of the cutting-edges 13, thereby preventing overheating andconsequent drawing of the temper of the reamerbit. Furthermore, the noncutting blank space li, following the lead of the larger part of thenose or leader, will serve the additional function of holding the Woodor material being bored perfectly steady, and thereby assisting in theboring of a perfectl r-straight hole.

From the above it is thought that the construction and operation of theherein. described reamer-bit will be readily understood, and changes inthe form, proportion, and the minor details of construction may beresorted to without departing from the principle or sacriiicing any ofthe advantages of this invention. Y

Having thus described the invention, what is claimed, and desired to besecured by Letters Patent, is

A reamer bit consisting of a hollow cylindrical body provided withdiametrically opposite longitudinally disposed slots having cuttingedges, and with a tapered end portion having a series of concentricshoulders interrupted by said slots and regularly decreasing in diametertoward the small end of the body, and a hollow conical leader detachablysecured to the small end of the body and provided with diametricallyopposite longitudinally disposed slots having cutting edges disposed outof alignment with those of the body, said leader being provided with asmooth circular blank portion agreeing with a corresponding portion atthe small end of the body, the alignedblank portions of the leader andthe body forming an elongated non-cutting portion between the uppermostcutting point of the leader and the lowermost cutting point of the body,said elongated non-cutting portion being less in diameter than theleader at its uppermost cutting point, substantially as and for thepurposes described..

In testimony that I claim the foregoing as my own I have hereto aiiixedmy `signalmre in the presence oi' two witnessesl LU'II l ER MYERS.fitnessesz W. C. GILMcRE, CARL TEWELL.

